R&S ESCI Receiver – Operation on a Discrete Frequency
1166.6004.12 4.3 E-2
Return to manual control – LOCAL Menu
LOCAL
The menu LOCAL is displayed on switching the instrument to remote control
mode.
At the same time, the HOTKEY bar is blanked out and all keys are disabled
except the PRESET key. The diagram, traces and display fields are then
blanked out (they can be activated using the remote control command
SYSTem:DISPlay:UPDate ON).
The menu contains only one softkey, the LOCAL key. The LOCAL key
switches the instrument from remote to manual control, with the assumption
that the remote controller has not previously set the LOCAL LOCKOUT
function.
A change in the control mode consists of:
- Enabling the Front Panel Keys
Returning to manual mode enables all inactive keys and turns on the
hotkey menu. The soft key menu which is displayed is the main menu of
the current mode.
Inserting the measurement diagrams
The blanked diagrams, traces and display fields are inserted.
- Generating the message OPERATION COMPLETE
If, at the time of pressing the LOCAL softkey, the synchronisation
mechanism via *OPC, *OPC? or *WAI is active, the currently running
measurement procedure is aborted and synchronisation is achieved by
setting the corresponding bits in the registers of the status reporting
system.
- Setting Bit 6 (User Request) of the Event Status Register
With a corresponding configuration of the status reporting system, this
bit immediately causes the generation of a service request (SRQ) which
is used to inform the control software that the user wishes to return to
front-panel control. This information can be used, e.g., to interrupt the
control program so that the user can make necessary manual
corrections to instrument settings. This bit is set each time the LOCAL
softkey is pressed.
Note: If the LOCAL LOCKOUT function is active in the remote control
mode, the front-panel PRESET key is also disabled. The LOCAL
LOCKOUT state is left as soon as the process controller de-
activates the REN line or the IEC/IEEE-bus cable is
disconnected from the instrument.
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